Sash-latch



W. S. HAMM.

SASH LATCH. APPLICATION man SEPT. 16, 1919.

1,353,834. P amdspt. 28,1920.

3 SHEETS-SHEET l.

W. S. HAMM.

SASH LATCH.

Patented Sept. 28, 1920.

3 SHEETS SHEET 2.

.-ilnil f ff nu wlmmll" mail, 76

WILLIAM s/HAMM.OFHUBBABJDwoonsfirtrivors, AssiGNoit To THE ADM/Ls a y vWiisfrLAKit COMPANY, A CORPORATION' or ILLINOIS.` l

' sAs'ii-LATGH. i

`Specification of Letters ateiit.,v :y Ptilltd I Application fiied'spte'mber i6, isis. sanar-1in.r esegesi vTo all @Uh/'0m t may concern: i Y

f Be it vknown that I, WILLIAM S. HAMM, a

citizen of the United States, andresident of l Hubbard Woods, county. of'gCook, and State ofV Illinois, Ahave invented certainnew and usefullmprovements in SashLatches, of

`)which the following isa specification, and

Y which are illustrated in the accompanying drawings, forming a part thereof. The invention relates to latches for window sash,- andis intended primarilyfor use in connection with windows of railway cars.

4vThe present practiceinvolves the use of latches which are easily released, and in case of'being -outof repair, as by the'breaki-ng of thebolt or a spring orl the loosening of holding screws, will fail to support the sash.

Serious accidents result, as travelers notginf as frequently Yrest their hand Vor arm on the' window sill and receive the -full force of the falling sash.v VCareless'or unintelligent manipulation of Asash latches, especially by children also frequently-occasion similarY accidents( l' Thelobjects of thel present invention are to guardagainst a too ready release of a sash latch,-to vso arrange the parts that a portion of the bolt'interloclcing withv the casing' will also be interlockedwith the: sash, and to prevent 4detachment of thelatch easing or the accidental retraction of the bolt should the latch mechanism be loosenedfrom its attachment to the sash,`orr`be out oforder.

"'/While the objects in view `may be secured by various forms of construction, 'certain 'embodiments oftheV inventionare hereinafter described andare illustrated in the aclcompanyingV 'drawings inwhich,

' Figure 1is adetail elevationof a window equipped'with the improved latch;

I Fig. 2 isa detail, partly in section, viewed Afrom the 'line 2-2 vof Fig. 1;

l Fig. 3 is la' sectional detail onthe line 3`3of Fig.2;' i i .y I Y Fig. is an inside view Vofthe latch detached;

Fig. 5 is a detailVo-f a preferred form of stop device; v. Y

Figg is 'a detail of the sash with the 'latch removed;

Fig. 7 Yis a 'detail elevation of the window showing a modified form' of construction of the latch:

Fig. 8 is a detail of the stop Adevice'r as shown in Fig. 7;' 1. s

vthe Acasing is mounted .a 'reciprocating bolt l 'r'g ais a' View imma-m0 Figli Shwin'g f stop and .detentA for 'supporting :the isash, as'

from line 1'0-10'ofk Fig. 9 illustrating the .i vbroader concept of the invention... i.

f .There is-.showii-.in the drawings a window 'casing comprising a sideportion 10 and a runway forthelsashlc.

A `The 'latch comprisesfa casing1'5,of any' suitable form, shown as being. applied to. the

silk-11,. 'with.the=usual-stops 12,1 13,rv forming l' surface-.of` onefof the sash rails :and secured by'meansofscrewsVas 16, `and as being pr`0 vided witli'a 'fixed' :grip member 1:7. Within 18, normally advanced bymeans of a spring 19 coiled about.' its shank and reacting .be-

tween the end wall of the casing' :and/avglug 2O xed to' the .bol-tn A lever :2L-@here shownv sov as fin the 'forni f of a bell-crank, is pivoted withintlie'.casing l.at .22,'one kof its arms Aengaging the "front .face .of :the lugf20, andfits other arm projecting :through asuitable ap.-

erture: in the rear wall ,of -tlie'casing and.

constituting a Vthuiifib-.piece '23, located above the member 1?-, By downward pressurecn thev thumbep'iece 23'fthe `boltis .retracted vagainst-the resistance' ofthe spring 19. kln operatingthe bolt `the usermay conveniently i grasp the` members' .and y:25 between his fn'gerfand thumb. i

fthe -boltycoperates with one'y orwgmore keepers attached Y' to the window casing;

'Preferably a plurality fof-keepers'are ,pron vided and ,for` convenience: offattachment are formed :on .a single'. bar24, which in the art' is known as a rack bar, 'andis securedto vthe casing stop 12fby1neans.of;screWS.iv I 1f .The 'severaly keepers take the form: of a seriesl ofwshoulders, as 25, .whichgcoperate 10c withthe latchbolt to .hold the sash at `any 'desired elevation. Each 'shoulder is preferably downwardly, inclined towardA the vplane of the sash, iin order that as thellboltrests upon it the sash-will be cammed outwardly A 11,05

against'the stop 13 for 4the purpose of pre-Y venting rattling. The' inner portionofeachY 1.

shoulder. is'recessed, .thereby forming vati'ts' f outer portion la flange or'shoulder 26 whichYV coperates with a shoulderlon the bolt here 1-10 formed by providing ya lateral recess or notch 27 in the bolt. rlhe sash being raised to such position thatthe bolt Ais above one of the keepers and is extended, is allowed to descend sufliciently to engage the bolt with the keeper, the notch 27 interlocking with the flange 26, thus preventing the withdrawal of the bolt either accidentally or by the manipulation of the lever or under the iniiuence of vibration should spring be weakened or broken, or should thelatch casing become loosened, until Ythe sash is again slightly raised. Preferably the inwardly facing portion 28 of the bar 24, above each of the keepers, is inclined inwardly and upwardly for camming the'bolt inward as the sash is raised, thus rendering it unnecessary to manipulate'the lever 21 in raising the .Y sash.

The bolt 18 is so disposed within the casing 15 that it lies at least partially within the sash rail.y Preferably the latch casing is provided with an integral apertured block 29, as shown, forming a bearing for Vthe outer end of the bolt and reinforcing` it against lateral stress. This block Ais entered into the sash and preventsthe separation of the latch casing therefrom should the holding screws be loosened or removed, so

long as the casing is adjacent to one of the keepers. Y

Shouldthe spring 19 be broken or weakened, or should the holding screws of the casing be loosened, or should the latch become defective for anyother reason, the sash will, nevertheless, be securely held by the bolt for the reason that the latter cannot be retracted because ofthe interlocking of its notch with the flange 26 and the partial embedding of the bolt within the sash. Even if the holding screws were entirely removed, the bolt would be held in place until the sash Vwere slightly raised to disengage it from the rib 26 and the casing could not be removed from the sash until it is raised above the rack or an individual keeper, when the rack bar form is not employed. f

' lt is observed in practice that travelers, especially children, not infrequently rest one hand upon the sill and attempt to manpulate the latch with the other, and serious accidents have occurred rby reason of the violent dropping 'of the sash.Y By the construction shown and described .the interlocking of the boltA shoulder VYwith the iiangev 26 effectually prevents such accidents asV it renders it difficult to release the latch -without employing both hands.

While a preferred form of construction is shown in Figs. 1 to 6, the invention may, nevertheless, be embodied di'erently. F or example, in Figs. 7 Vand 8 there is shown a construction in which the keeper 30 is provided with a transverse flange or lip 31 for engaging a recess 32 crossing the lower face of the bolt, and which will effectually prevent the bolt from being arred back should thespring be broken,'or from being manually retracted without raising the sash.

ln Figs. 9, 10 and 11 a further modification is shown. The window casing, the sash, and the latch mechanism are the same as in Figs. 1 and 5. yThe keepers take the form of approximately half round loops 33 formed in a metal strip 3.4.- which is secured to the sash engagingface of the stop 12, the loops 33 being entered into the stop.

W hen advanced the bolt 1S enters into one of these loops 33. ln order to prevent the accidental withdrawal of the bolt the loops 33 are somewhat elongated vertically, and each is provided at its outer'margin and adjacent its lower end with a shoulder 35, for

Vengaging the bolt shoulder heretofore de scribed. The Yshoulderu is provided in this instance by forming a rib in the loop and the bolt shoulder by a transverse recess across the lower face of the bolt. ,ln this construction as in that of Figs. 1 to 5 the advantage of having the bolt partially embedded within the sash and partially within the keeper Vis obtained, as is also the advantage ofhaving the bolt interlockedwith the keeper to prevent its withdrawal until the sashshall have been slightly raised.

Fig. 12 is a diagrammatic view for the purpose of more clearly illustrating the feature of interlocking the sash with the casing stop by means of a detent inthe form of a bolt or plug which enters an aperture, formed in part within kthe sash and inrpart within the stop. ln practice this detent takes theform of a latch bolt but obviously the sash might be thus secured by the use of a simple peg` which would fit within the aperture. f f

1 claim as my invention: l

1. ln combination, a window casing having a sash stop, a sash tting within the casing and slidably engaging the stop, and a detent adapted to enter between the sash and stop and to extend laterally into each.

2. 111 combination, a window casing having a sash stop, a sash fitting within the casing and slidably engaging vthe stop, and a detent adapted to enter betweenthe sash and stop andto extend laterally into each, such detenthaving a lateral'shoulder and the recess in the keeper being vertically wider than the portion of the bolt received by it and having a shoulder at its lower portion engageable back of the detent shoulder. 3. ln combination, a ,sash latch comprising a reciprocable bolt adapted to be partally laterally embedded in a sash, and a keeper carried by' the casing for the sash and adapted to partially laterally receive the bolt.

t. 1n combination, a window casing havn'gra sash stop, a sash ttingvrwithn the casing and slidably engaging the stop,` a

latch secured to the sash and having a reciprocable bolt partially laterally embedded in the sash, and a keeper secured tothe stop' Y and .adapted to partially laterally receive' j the bolt.

' the bolt, such bolt having a lateral shoulder i 5. In combination, a sash latch comprising a reciprocable bolt adapted'gto be partially laterally embedded in a sash, and a keeper carried by the casing for the sash and adapted, to partially laterally receive adapted to engage a shoulder on the keeper.

6. In combination with a sliding sash and Vits casing7 a latch comprising a casing at-` tached to the sash and having a boss at its forward end fitting within a complementary Y recess in the sash rail, and a reciproeable bolt slidable through the boss, and a keeper attached to the casing and having a bolt re-` ceiving recess open toward the face of the v sash.

7. In Combination with a Sliding sash mi interlock when the sash is partially lowered.

with the bolt extended. Y Y

8. ln combination with a sliding-sash Vand forward end fitting within a complementary recess in the sash rail, and a reciprocableV bolt slidable through the boss7 and akeeper attached to the casing and having a bolt receiving recess open toward the face-oft` the sash, the bolt having a lateralshoulder and the keeper having a shoulder engageable back of the bolt shoulder when the sash is e partially lowered with the bolt extended.

WILLIAM sgprniMM;

3.5 v Vits casing,Y a latehcomprising a casing at;` Y Vtached lto thesash andv having a boss at-lts- 

